Localization, Coulomb interactions, and electrical heating in single-wall carbon nanotubes/polymer composites
Localization, Coulomb interactions, and electrical heating in single-wall carbon nanotubes/polymer composites
Low-field and high-field transport properties of carbon nanotubes/polymer composites are investigated for different tube fractions. Above the percolation threshold ${f}_{c}\ensuremath{\sim}0.33%,$ transport is due to hopping of localized charge carriers with a localization length $\ensuremath{\xi}\ensuremath{\sim}10\ensuremath{-}30 \mathrm{nm}.$ Coulomb interactions associated with a soft gap ${\ensuremath{\Delta}}_{\mathrm{CG}}\ensuremath{\sim}2.5 \mathrm{meV}$ are present at low temperature close …